package com.itheima.reggie.conrtroller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> findAll(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> dishPage = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(dishPage, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(dishPage, dishDtoPage, "records");
        List<Dish> records = dishPage.getRecords();
        List<DishDto> list = records.stream().map(item -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品和口味
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        dishService.updateWithFlavor(dishDto);
        return R.success("修改成功");
    }

    /**
     * 菜品分类列表查询
     * @param dish
     * @return
     * /
    @GetMapping("/list")
    public R<List<Dish>> list(Dish dish) {
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        wrapper.eq(Dish::getStatus, 1);
        wrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        wrapper.like(dish.getName() != null, Dish::getName, dish.getName());
        List<Dish> list = dishService.list(wrapper);
        return R.success(list);
    }*/

    /**
     * 根据id删除菜品
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        dishService.removeWithFlavor(ids);
        return R.success("删除成功");
    }

    /**
     * 禁用菜品
     * @param ids
     * @return
     */
    @PostMapping("/status/0")
    public R<String> update0(@RequestParam List<Long> ids) {
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.in(Dish::getId, ids);

        List<Dish> list = dishService.list(wrapper);
        list.stream().map(item->{
            item.setStatus(0);
            return item;
        }).collect(Collectors.toList());
        dishService.updateBatchById(list);
        return R.success("菜品信息修改成功");
    }

    /**
     * 启用菜品
     * @param ids
     * @return
     */
    @PostMapping("/status/1")
    public R<String> update1(@RequestParam List<Long> ids) {
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.in(Dish::getId, ids);
        List<Dish> list = dishService.list(wrapper);
        list.stream().map(dish -> {
            dish.setStatus(1);
            return dish;
        }).collect(Collectors.toList());
        dishService.updateBatchById(list);
        return R.success("菜品信息修改成功");
    }

    /**
     * 查询菜品、菜品口味
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto>dishDtos=null;
        //动态构造key
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从redis中获取缓存数据
        dishDtos = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtos != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtos);
        }
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        wrapper.eq(Dish::getStatus,1);
        wrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(wrapper);
        dishDtos=list.stream().map(item->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long id = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(id);
            if (category!=null){
                String name = category.getName();
                dishDto.setCategoryName(name);
            }
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> wrapper1 = new LambdaQueryWrapper<>();
            wrapper1.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> flavorList = dishFlavorService.list(wrapper1);
            dishDto.setFlavors(flavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtos,60, TimeUnit.MINUTES);
        return R.success(dishDtos);
    }
}
